| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Mentha spicata | Essential Oil | -- | -- | * | |
| Rosmarinus officinalis | Resin, Exudate, Sap | -- | -- | * | |
| Fagopyrum esculentum | Seed | -- | -- | * | |
| Avena sativa | Seed | -- | -- | * | |
| Zingiber officinale | Rhizome Essent. Oil | 2.0 | 700.0 | * | |
| Zea mays | Leaf | -- | -- | * | |
| Zea mays | Shoot | -- | -- | * | |
| Mentha spicata | Leaf | -- | -- | Duke, J. A. Writeups or information summaries on approximately 2,000 economic plants, USDA, ARS, Beltsville, MD 20705. | |
| Zea mays | Hull Husk | -- | -- | * | |
| Zea mays | Husk Essent. Oil | -- | 50000.0 | * | |
| Zea mays | Seed Essent. Oil | -- | -- | * | |
| Helianthus annuus | Seed | -- | -- | * | |
| Panax ginseng | Shoot | -- | -- | * |